/* include ---------------------------------------------------------*/
#include "wifi_dev.h"
#include "time_weather.h"
#include "sntp_dev.h"
#include "led_dev.h"


/* private define -------------------------------------------------*/
#define EXAMPLE_ESP_WIFI_SSID      "MNIAS"
#define EXAMPLE_ESP_WIFI_PASS      "1234567890"

/* private variables ----------------------------------------------*/
static const char *TAG = "wifi station";
/* FreeRTOS event group to signal when we are connected*/
EventGroupHandle_t s_wifi_event_group;
uint8_t wifiState = 0;

/* private function prototypes ------------------------------------*/

/* public variables -----------------------------------------------*/

void WIFI_run_task(void *pvParameters)
{
    static uint8_t onceFlag = 0;
    while(1)
    {
        EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
        WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
        pdFALSE,
        pdFALSE,
        portMAX_DELAY);

        if(bits & WIFI_CONNECTED_BIT) 
        {
            if(!onceFlag)
            {
                onceFlag = 1;
                ESP_LOGI(TAG, "connected to ap SSID:%s password:%s", EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
                wifiState = 1;
                HTTP_task_create();
                SNTP_task_create();
                LED_task_delete();
            }
        } 
        else
        {
            if(onceFlag)
            {
                onceFlag = 0;
                ESP_LOGI(TAG, "wifi disconnect, so delete some task");
                wifiState = 0;
                HTTP_task_delete();
                SNTP_task_delete();
                LED_task_create();
            }
        }
        vTaskDelay(100 / portTICK_PERIOD_MS);
    }
}


static void event_handler(void* arg, esp_event_base_t event_base,
                                int32_t event_id, void* event_data)
{
    if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) 
    {
        esp_wifi_connect();
    } 
    else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) 
    {
        esp_wifi_connect();
        ESP_LOGI(TAG, "retry to connect to the AP");
        xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
        xEventGroupClearBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
    } 
    else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) 
    {
        ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
        ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
        xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
        xEventGroupClearBits(s_wifi_event_group, WIFI_FAIL_BIT);
    }
}

void wifi_init_sta(void)
{
    s_wifi_event_group = xEventGroupCreate();

    ESP_ERROR_CHECK(esp_netif_init());

    ESP_ERROR_CHECK(esp_event_loop_create_default());
    esp_netif_create_default_wifi_sta();

    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    ESP_ERROR_CHECK(esp_wifi_init(&cfg));

    esp_event_handler_instance_t instance_any_id;
    esp_event_handler_instance_t instance_got_ip;
    ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,
                                                        ESP_EVENT_ANY_ID,
                                                        &event_handler,
                                                        NULL,
                                                        &instance_any_id));
    ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT,
                                                        IP_EVENT_STA_GOT_IP,
                                                        &event_handler,
                                                        NULL,
                                                        &instance_got_ip));

    wifi_config_t wifi_config = {
        .sta = {
            .ssid = EXAMPLE_ESP_WIFI_SSID,
            .password = EXAMPLE_ESP_WIFI_PASS,
            /* Setting a password implies station will connect to all security modes including WEP/WPA.
             * However these modes are deprecated and not advisable to be used. Incase your Access point
             * doesn't support WPA2, these mode can be enabled by commenting below line */
	     	.threshold.authmode = WIFI_AUTH_WPA2_PSK,
        },
    };
    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA) );
    ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config) );
    ESP_ERROR_CHECK(esp_wifi_start() );

    ESP_LOGI(TAG, "wifi_init_sta finished.");

    xTaskCreate(&WIFI_run_task, "WIFI_run_task", 2048, NULL, 8, NULL);

    /* The event will not be processed after unregister */
    // ESP_ERROR_CHECK(esp_event_handler_instance_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, instance_got_ip));
    // ESP_ERROR_CHECK(esp_event_handler_instance_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, instance_any_id));
    // vEventGroupDelete(s_wifi_event_group);
}
